a(n) = [x^n] 1/(1 - Sum_{k>=1} k^n*x^(2*k)/(1 - x^k)).
A321263
a(n) = [x^n] 1/(1 - Sum_{k>=1} k^n*x^(2*k)/(1 - x^k)).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =18a(5) =3a(6) =926a(7) =264a(8) =146255a(9) =64190a(10) =138356840a(11) =22816773a(12) =509079790798a(13) =108923489863
External references
- oeis: A321263